Add support for tcp.analysis.spurious_retransmission to TCP dissector

This issue was migrated from bug 8614 in our old bug tracker.

Original bug information:

Reporter: Joe McEachern
Status: RESOLVED FIXED
Product: Wireshark
Component: Dissection engine (libwireshark)
OS: Linux
Platform: x86
Version: Git

Attachments:

tcp_spurious.patch: Patch that adds tcp.analysis.spurious_retransmission support
spur.pcapng: Sample capture

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